package org.maxkey.web.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.maxkey.util.StringUtils;
import org.maxkey.web.WebConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 * @author Crystal.Sea
 */
public class SingleSignOnFilter implements Filter {
	private static final Logger _logger = LoggerFactory.getLogger(SingleSignOnFilter.class);
	
	public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {

		HttpServletRequest httpServletRequest = (HttpServletRequest) request;
		HttpServletResponse httpServletResponse = (HttpServletResponse) response;
		HttpSession session = httpServletRequest.getSession();
		//浠巗ession涓幏鍙栧瓨鏀剧殑appid
		String appId = (String) session.getAttribute(WebConstants.SINGLE_SIGN_ON_APP_ID);
		//鑾峰彇鏈�鍚庝竴涓�"/"鐨勬暟鎹綔涓篴ppid锛屼繚瀛樺湪session涓�
		if(StringUtils.isNullOrBlank(appId)) {
			String uir = httpServletRequest.getRequestURI();
			session.setAttribute(WebConstants.SINGLE_SIGN_ON_APP_ID, uir.substring(uir.lastIndexOf("/")+1));
			session.setAttribute("protocol", "formbase");
		}
		chain.doFilter(request, response);
	}
		
	public void destroy() {
		_logger.debug(" destroy.");
	}

	public void init(FilterConfig config) throws ServletException {
		_logger.debug(" init.");
	}
}
